BIKERELIABILITY Reg check
League table/ TGB/101R
Model report · 2005–2025

TGB 101R

49cc Petrol Class 1
#4614 of 5428 overall #7 of 13 TGBs #203 of 456 moped bikes
71.5%
first-time pass rate
19.3%
failed outright
4,854
median miles at test
601
MOT tests, 2005–2025
-3.9pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate over time

first-time pass rate by test year · 2010–2017

The 101R's first-time pass rate has fallen 5.6 points since 2010, 76.6% to 71.0%.

60%70%81%2010: 76.6% pass (47 tests)2011: 70.2% pass (84 tests)2012: 77.3% pass (97 tests)2013: 63.3% pass (90 tests)2014: 71.8% pass (85 tests)2015: 76.8% pass (56 tests)2016: 71.8% pass (39 tests)2017: 71.0% pass (31 tests)20102017

What fails on a 101R

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
84 27.8 1.7×
brakes
84 27.8 2.3×
steering and suspension
58 19.2 2.4×
tyres and wheels
25 8.3 1.8×
lamps and reflectors
23 7.6 1.1×
suspension
10 3.3 1.1×
fuel and exhaust
7 2.3 1.3×
reg plates and vin
5 1.7 1.5×
driving controls
5 1.7 3.5×
audible warning (Horn)
1 0.3 0.9×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the 101R beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests Compare head-to-head →
PIAGGIO ZIP 71.3% pass · 79.0k tests Compare head-to-head →
PIAGGIO NRG 65.5% pass · 40.5k tests Compare head-to-head →
PEUGEOT VIVACITY 70.4% pass · 29.7k tests Compare head-to-head →

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the 101R.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the 101R

More TGB models

other TGB bikes ranked by MOT pass rate
TGB 202 72.5% pass · 4,670 tests
TGB R50 X 70.3% pass · 1,879 tests
TGB 304 70.2% pass · 1,243 tests
TGB 302 73.6% pass · 1,060 tests
TGB DELIVERY 74.7% pass · 794 tests
TGB BR8 R125X 70.0% pass · 480 tests

See all TGB models →

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2008 (73.3% pass). Weakest: 2009 (68.1%).

67%71%74%2007: 72.4% pass (210 tests)2008: 73.3% pass (225 tests)2009: 68.1% pass (94 tests)200720082009

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

TGB 101R FAQ

answers computed from the data above · terms in the glossary

Is the TGB 101R reliable?

The TGB 101R is about average for its class: 71.5% of its 601 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4614 of 5428 models.

What does a 101R fail its MOT on most?

lighting and signalling — 28% of all defects recorded against failed 101R tests.

What is the best year of 101R to buy used?

By first-time pass rate, 2008-registered examples do best (73.3%) and 2009 worst (68.1%). Condition and history still trump the year.

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